Paper cartridge.



No. 878,818. PATEHTED FEB. 11, 1908. J. J. MILLER & J. DREISTADT, Jn. PAPER CARTRIDGE.

APPLIOATIOI FILED IBPTJ. 1901.

l V N TOR-5 J." J: 111/315 v): Drel's 1'0 0/40.

UNITED STATES PATENT OF FICE.

JACOB .LMILLER AND JOHN DREISTADT, JR, OF OLD FORGE, PENNSYLVANIA.

PAPER CARTRIDGE.

Specification of Letters Patent.

Patented Feb. 1 1, 1908.

Application filed September 6. 1907- Serial No. 391671.

To all whom it may concern:

-Be it known that we, JACOB J. MILLER and JOHN DREISTADT, Jr., citizens of the United States, residing at Old Forge, in the county of Lackawanna and State of Pennsylvania, have invented certain new and useful Improvements we do hereby declare the following to be a full, clear, and exact description of the invention, such as will enable others skilled in the art to which it appertains to make and use t e same.

Our invention relates to new and useful improvements in cartridges, and more articularly' to that class adapted to be use for inclosing explosives, such as blasting powder, or the like, and our object is to provide a cartridge of this kind which will keep the powder in a dry state, after the same is properly inclosed by the cartridge.

A further object is to provide means for reinforcing the cartridge so that the seams therein will not become separated whenthe cartridge is tamped into a hole.

Other objects and advantages will be hereinafter referred to and more particularly pointed out in the claims.

Referring to the drawings which are made a part of this application, Figure 1 is a side elevation of the cartridge complete, showing the inner section of the cartridge in dotted lines. Fig. 2 is a side elevation of the outer section of the cartridge, showing the overlapping portions of the seam in dotted lines. 1g. 3 is a sectional view thereof, as seen on line 33 Fig. 2. Fig. 4 is a sectional View of the cartridge complete in one stage of preparation, and, Fig. 5 is an end elevation of the cartridge ready to receive the explosive material.

In the drawings, similar reference numerals designate corresponding parts throughout the several views.

In constructing cartridges of this kind, it has been found preferable to form the same of two or more sections, and to this end, we have provided an outer and inner casingl and 2, respectively, said casings being preferably formed of strips of paper, which are so formed that the scams 3 will extend spirally from end to end of the casings, thereby rendering the casings tubular in cross section, and when the inner casing is properly inserted in the outer casing, the seams of the inner casing will rest substantially midway betweenthe seams of the outer casing.

in Paper Cartridges; and

,In order to render the cartridge water or damp proof, the outer casing is treated with a coating of shellac, or similar substance, which not only makes the outer casing water proof, but adds strength thereto from stiffenin the paper employed in forming the cartridge.

After the shellac placed u on the outer casing has become hardened, tile inner casing is inserted therein, and the cartridge then passed between rollers, which will flatten the cartridge, as shown in Fi 4 of the drawings, so that when the cartrirIge is opened to receive the explosive, ridges 4 and 5 will be formed the full length of the cartrid e, and at diametrically opposite points, so t at the seams will be formed into oppositely disposed braces, the ridges forming the division between the bracing portions of the seams. It will further be seen that by forming the seams spirally around the casing, the overlapped portion of the material forming the casing will be drawn closer together when pressure is applied at the ends of the casing, so that when the cartridge is placed in a blasting hole, and the same is being tamped therein instead of the cartridges opening at the seam, as is common with cartridges as now constructed, the strain upon the seams at opposite sides of the two ridges will cause the overlapped portions to draw closer together instead of separating.

The cartridges are formed in lengths to .hold a pre-determined quantity of the explosive, and after the explosive is placed therein, the ends of the cartridge are folded inwardly and secured in any preferred manner, and owin to the fact that the outer casing is covered With water proof material, the contents of the cartridge will be thoroughly protected from dampness.

It will thus be seen that we have provided a very cheap and economical form of cartridge, and one wherein the seams will be caused to bind closer together instead of separating when pressure is ap lied at the ends of the cartrid e, and it further be seen that by provi ing the ridges at diametrically opposite sides of the cartridge, the Walls of the cartridge will be materially reinforced.

What I claim is 1. As an article of manufacture, a cartrid e formed of a strip of material, the seam of wiich is directed spirally from end to end of the cartridge, and the cartridge then flatstrip of material in the form 0 a tube being the seams of the inner casing being 15 at a phase difference of substantially onehalf the distance between the seams of the outer casing, and means to form the seams into oppositely disposed brace sections.

In testimony whereof we have signed our 20 names to this specification in the presence of two subscribing witnesses.

. JACOB J. MILLER.

JOHN DREISIADT, JR.

tened to form ridges, whereby the seams at 5 the casing,

the opposite sides of the ridges will form brace members. i The herein-described cartridge corn-i prising a tubular casing formed from a strip of material, the seams formedb Y securing the spire-ll r disposed from end to end of the cartridge, said cartridge being compressed to form ridges, whereby the seams will form oppositely disposed braces.

3. A cartridge of the class described com prisin an inner and outer casing, the seams of which extend spirally from end to end of W'itnesses:

W. H. GILLEsPIE, LE0 J. SCHWARTZKOPF. 

